ArticlePLoS pathogens2010
The role of coupled positive feedback in the expression of the SPI1 type three secretion system in Salmonella.
Article in PLoS pathogens, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 69 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
69 citing papers in PubMed, 135 citations in OpenAlex.
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- Regulator-derived growth and fitness costs ofbioRxiv : the preprint server for biology · 2026Article
- Bimodal expression of Type 3 Secretion System 2 enables cooperative virulence among intracellular Salmonella Typhimurium.PLoS pathogens · 2025Article
- Pseudomonas syringae Lipopolysaccharide Synthesis Gene wbpL Displays Heterogeneous Expression Within In Vitro and In Planta Populations.MicrobiologyOpen · 2025Article
- Growth rate controls the sensitivity of gene regulatory circuits.Science advances · 2025Article
- Pseudomonas syringae subpopulations cooperate by coordinating flagellar and type III secretion spatiotemporal dynamics to facilitate plant infection.Nature microbiology · 2025Article
- N-Acetyl cysteine exhibits antimicrobial and anti-virulence activity against Salmonella enterica.PloS one · 2025Article
- Transcription-driven DNA supercoiling counteracts H-NS-mediated gene silencing in bacterial chromatin.Nature communications · 2024Article
- The read-through transcription-mediated autoactivation circuit for virulence regulator expression drives robust type III secretion system 2 expression in Vibrio parahaemolyticus.PLoS pathogens · 2024Article
- Article
- SPI-1 virulence gene expression modulates motility of Salmonella Typhimurium in a proton motive force- and adhesins-dependent manner.PLoS pathogens · 2023Article
- Small RNAs Activate Salmonella Pathogenicity Island 1 by Modulating mRNA Stability through theJournal of bacteriology · 2023Article
- Article
- Pervasive transcription enhances the accessibility of H-NS-silenced promoters and generates bistability inProceedings of the National Academy of Sciences of the United States of America · 2022Article
- AraC-type regulators HilC and RtsA are directly controlled by an intestinal fatty acid to regulate Salmonella invasion.Molecular microbiology · 2021Article
- Article
- Long-Distance Effects of H-NS Binding in the Control ofJournal of bacteriology · 2021Article
- An incoherent feedforward loop formed by SirA/BarA, HilE and HilD is involved in controlling the growth cost of virulence factor expression by Salmonella Typhimurium.PLoS pathogens · 2021Article
- HilE is required for synergistic activation of SPI-1 gene expression in Salmonella enterica serovar Typhimurium.BMC microbiology · 2021Article
9 more citing papers are in PubMed but not listed here.
Corrections and comments
- Erratum issued
Authors and funding
4 authors at 1 institution in 1 country.
Funding
Abstract
Salmonella enterica serovar Typhimurium is a common food-borne pathogen that induces inflammatory diarrhea and invades intestinal epithelial cells using a type three secretion system (T3SS) encoded within Salmonella pathogenicity island 1 (SPI1). The genes encoding the SPI1 T3SS are tightly regulated by a network of interacting transcriptional regulators involving three coupled positive feedback loops. While the core architecture of the SPI1 gene circuit has been determined, the relative roles of these interacting regulators and associated feedback loops are still unknown. To determine the function of this circuit, we measured gene expression dynamics at both population and single-cell resolution in a number of SPI1 regulatory mutants. Using these data, we constructed a mathematical model of the SPI1 gene circuit. Analysis of the model predicted that the circuit serves two functions. The first is to place a threshold on SPI1 activation, ensuring that the genes encoding the T3SS are expressed only in response to the appropriate combination of environmental and cellular cues. The second is to amplify SPI1 gene expression. To experimentally test these predictions, we rewired the SPI1 genetic circuit by changing its regulatory architecture. This enabled us to directly test our predictions regarding the function of the circuit by varying the strength and dynamics of the activating signal. Collectively, our experimental and computational results enable us to deconstruct this complex circuit and determine the role of its individual components in regulating SPI1 gene expression dynamics.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.